Reis, Cláudia, José Gameiro dos Santos, Rosário Figueirinhas, Telma Feliciano, Cristina Ramos, Melo Pires, and Cecília Almeida e Sousa. “Intranasal Endoscopy Diagnosing Skull Base Pathology: A Case of Clivus Chordoma”. Portuguese Journal of Otorhinolaryngology and Head and Neck Surgery 49, no. 4 (December 28, 2011): 293–297. Accessed November 15, 2026. https://journalsporl.com/index.php/sporl/article/view/2541.